CVE-2026-59820: LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format

Q: How do I fix CVE-2026-59820?

litellm: upgrade to 1.83.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-59820 being exploited?

CVE-2026-59820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59820 affect?

CVE-2026-59820 affects litellm. Severity is medium (CVSS 6.5). LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.7-stable, LiteLLM Skills archive extraction did not sufficiently validate file paths from uploaded skill ZIP archives, allowing an authentic

Q: How urgent is CVE-2026-59820?

Priority 35/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-59820 is a medium-severity flaw (CVSS 6.5) affecting litellm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.7-stable, LiteLLM Skills archive extraction did not sufficiently validate file paths from uploaded skill ZIP archives, allowing an authenticated user with access to LiteLLM LLM API routes or a key whose allowed_routes includes /v1/skills, anthropic_routes, or llm_api_routes to upload a crafted skill archive containing path traversal entries that co

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: litellm

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 20:16 UTCPublished CVE record published
2026-10-25 17:10 UTCUpdated Record last modified

litellm litellm UPGRADE

Affected: < 1.83.7 · 1.83.7 rc1

Fixed in: 1.83.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy litellm || rpm -q litellm || litellm --version

2. UPGRADE to 1.83.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade litellm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade litellm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59820?

litellm: upgrade to 1.83.7. Exact commands for each OS are on this page.

Is CVE-2026-59820 being exploited?

CVE-2026-59820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59820 affect?

CVE-2026-59820 affects litellm. Severity is medium (CVSS 6.5). LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.7-stable, LiteLLM Skills archive extraction did not sufficiently validate file paths from uploaded skill ZIP archives, allowing an authentic

How urgent is CVE-2026-59820?

Priority 35/100. No elevated risk signals yet.

Software pages

OpenAI and LLM tools vulnerabilities

Related CVEs

CVE-2026-59822 HIGH 8.2 EXPLOITED UPGRADE BerriAI LiteLLM Improper Authentication Vulnerability
CVE-2026-59821 HIGH 7.2 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-59819 MEDIUM 4.9 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-35030 CRITICAL 9.1 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-35029 HIGH 8.8 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format

References

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